Hi,
the Bristol-199 was a tilt-wing VTOL convertiplane project of 1956,powered by four Rolls-RoyceTyne or Proteus engines.
http://aerosociety.com/News/Insight-Blog/2267/Birds-of-Prey-the-CV22-Osprey-in-the-UK
Tilt-wing/rotors are rotorcraft so moved to main section. Thanks hesham :)
Airplanes are beautiful dreams. Engineers turn dreams into reality.
Bristol Aircraft Since 1910 lists these specifications.
Power Plant - Four 4,000 shp Rolls-Royce TynesNo. of Rotors & Blades - 2x4Rotor Diameter - 48 ftFuselage Length - 66 ftHeight - 26 ftEmpty Weight - 35,300 lbAll-Up Weight - 60,000 lbDesign Cruise Speed - 400 mphDesign Cruise Range - 800 milesAccommodation - 3+50
K.